... ,NEW STYLE,USK. Re: Mould and QC.Highly accurate Mould design,development, are alll finished by ourselves,and our R&D ... automatic way. it is about 450,000 pairs per month. Crown iron hidden hinges for wooden door1)Material: iron SPHC;2 ... *75*2.5mm,100*75*2.0mm;3)Hinge with flat or crown head;4)Fixed or loose pin; 5)Bearings: ball ... /box and 100pcs or 50 pairs/carton. Iron door hinge with crown head